410 2 _
‡a
Northwestern University (Evanston, Ill.).
‡b
Program for Applied Research on Fertility Regulation.
‡t
P.A.R.F.R. series on fertility regulation
410 2 _
‡a
Northwestern University (Evanston, Ill.).
‡b
Program for Applied Research on Fertility Regulation.
‡t
PARFR series on fertility regulation.
410 2 _
‡a
Northwestern University, Evanston, Ill.
‡b
Program for Applied Research on Fertility Regulation.
‡t
PARFR series on fertility regulation
430 _ 0
‡a
P.A.R.F.R. series on fertility regulation